Screw-machine.



Patented Apr. 9, |90l.

s. SITTMANN, SCREW MACHINE.

(Application Bled Mar. 2B, 1900.)

8 Sheets-Sheet l.

(no Modem Km. w

4 d *el ll m O 1 No. 67|,56a.

' Patented Apr. 9, lool. n. slTTmANN.

scnEw MACHINE.

. A l' nl Har. 2B, 1900. (un Modem www ed l s sheets-sheet 2.

N@ com@ No. 57|,568Y y n Patented Apr. 9, |901. G. SITTMANN.

SCREW MACHINE.

(Application lsd Mar. 28, 1900.)

8 Sheets-Sheet 3.

(N0 Model.)

6260/ anim/44ML me Nonms frans cc.. worn-uws.. WASHINM'QN, n. c,

"0.671,568. Patented Apr. 9, Ism. s. SITTMANN.

SCREW MABHINE.

mppximion 'ma ninas, 1900.1 Ulu Nudel.) 8 Shoots-Shut 4.

No. '67|,5sa. Y Patented Apr.. 9, 190|.

s. SITTMANN. l

` scm-:w mAcHmg.

[Application led Mur. 28, 1900 (No Model.) 8 Sheets-Sheet 5.

N0. 6'7|,568. Patented Apr. 9, IQ.

L7G. SITTMANN. SCREW MACHINE.

(no nogal.) implicati med n 28 um] s sheets-sheet s.

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Patented Apr. 9, 190|.

No. enses.

- 1G. SITTMANN.

SCREW MAGHINE.

. (Appntion mean". 2s, 1900.

(llo odel.)

- WITNESSES INVENTOR '4 7 Jim.

Patented Apr."9, |90I. G. SITTMVANN. 1 SBREW MACHINE. (Application nedmr. 28, moo.)

8 Smets- Sheet 8.

(N0 Model.)

m: sums mins eo. Pnoraumo.. WASHINGTON. n. c.

- UNrrnD STATES A ATENT OFFICE.

. GUSTAV SITTMANN, OF BROOKLYN, NEV YORK.

SCREW-MACHINE.

SPECIFICATION forming part 0f Letters Patent No. 671,568, dated April 9,190i.

Application filed March 28| 1900. Renewed January 3l, 1901. Serial No.45,475. .No model.)

To all whom, t may concern:

Be it known thatl, GUsTAv SITTMANN, a

citizen of the United States, residing in New York city, borough ofBrooklyn, State of New York,have invented certain new and usefulImprovements in Machines for Making Screws, dac., of which the followingis a Specification. i

My invention relates to improvements in machines for making screws andother articles from lengths of material, and has for its objectgenerally to simplify and improve the construction and operation of thisclass of machines. j

One of the principal portions of my inven tion relates to improved meansfor feeding the tools to the work or stock with a speed in accordancewith the character of the work to be performed by the tool; and to thisend I provide a reciprocative tool-carrier or turret and devices foradvancing it toward the work, which devices comprise a novel camarranged to rotate at a definite or constant speed for feeding tools,but having such a workingsurface that, in conjunction with an adjustablelever or arm, the cam-surface will cause the tool-carrier or turret toadvance the tool to the work at a speed that accords with the portion ofthe cam with which such lever or arm is alined. Means are provided forshifting the lever or arm longitudinally of the cam and for holding itin any required position to produce the desired feeding speed of thetool. Means are also provided to cause the turret to return from thework at a speed relatively j faster than the feed of the tool toward thework by said cam to save time in the complete travel of a tool towardand from the work.

The invention also comprises improvements in the immediate devices thatcooperate with the tool-holder or turret7 in devicesv for the cross-cutof the stock, in the devices for operating the stock-holding chuck andfor rotating the latter, and also in the novel details of improvement,that will be more fully hereinafter set forth and then pointed out inthe claims.

Reference is to be had to the accompanying drawings, forming parthereof, wherein-- Figure l` `is a plan View of a machine embodying myimprovements. Fig. la is a detail plan view of the turret ortoolcarrying guide. Fig. lb is an inverted plan view of theturret-slide, showing the ratchet for rotating and the devices forlocking the turret. Fig. 2 is a side elevation looking from the bottomof Fig. 1. Fig. 3 is a vertical crosssection, enlarged, on the plane ofthe line 3 3 in Fig. 2 looking in the direction of the arrow a. Fig. 4is a vertical cross-section on the plane of the line 4 4 in Fig. 2looking in the direction of the arrow b. Fig. 5 is a perspective view ofthe main cam. Fig. 6 is a perspective view of the same, inverted fromthe position shown in Fig. 5. Fig is a view similar to Fig. 5, showingthe cam reversed end for end. Fig. S is a side View of the cam. Fig. 9is a vertical cross-section, enlarged, on the plane of the line 9 9 inFig. 2 looking in the direction of the arrowc. Fig. 9a is a pelspectiveView of the cam shown in Fig. 9. Fig. 9b is a similar View of the camshown in dotted lines in Fig. 9 looking from the opposite side. Fig. l0is a longitudinal section, enlarged, on the plane of the line l0 in Fig.l, showing the devices for feeding the work. Fig. l1 is a cross-sectionthereof on the line ll ll in Fig. lO looking from the left. Fig. 12 is asimilar view on the line l2 l2 in Fig. l0 looking from the right; andFig. 13 is a detail side view of part of the devices shown in Fig. l0,more particularly illustrating the pu lley and its connections.

In the accompanying drawings,in which similar characters of referenceindicate corresponding parts in the several views, the numeral 1indicates a suitable frame or bed, upon which the operative parts of themachine are mounted and which may be supported upon legs, a standard, orin any other suitable manner.

2 is a tool-holder or turret, which may be of any suitable form,provided with suitable means for supporting tools, and the same ismounted upon a slide 3, carried bya guide 4,

to travel toward and from a work-holder 5, and the guide 4 is suitablysupported upon an appropriate part of the frame l, as upon a shelf orthe like 4X. Guide 4 is preferably made adjustable toward or from chuck5, as by screws 4l', to accommodate different lengths of stock or workproject-ing from the chuck. This also enables the tools to be held ICOclose to the. turret .to reduce vibration, which would occnriflthe toolswere adjusted out wardly from the turret to accommodate short lengths ofstock, and it enables the turret to be set farther away from the chuck,so that longer lengths of stock ca'n extend therefrom. The slide 3 isshown provided with longil tudinal'grooves on its sides, that receivegibs 6, secured to the guide 4. (See Fig. 3.)

While any suitable means may be provided for reciprocating the slide 3,the devices I have shown for the purpose comprise a rack 7', secured toslide 3 on the under side thereof and within a suitable space 4a, formedin the upper surface of guide 4, and said rack meshes with a pinion 8,journaled on a-pivot 8, carried by guide 4 within said space.

9 is a transversely-disposed rack arranged in bearings in guide 4 so asto reciprocate and-in mesh with pinion 8, the endsofv the rack 9projecting from opposite sides'of guide 4. (See Figs.1and1a.) Thus asrack 9 is reciprocated pinion 8 will transmit reciprocatory. motion toslide 3 to move the turret toward and from-the work-holder 5.

Any suitable means may be provided for rotating the turret to bring thetools in line with the work and for holding the tools in the workingposition. I have shown the turret 2 as provided with adepending stem2,that which block fits in aI conical bore 3a in slide 3, whereby theturret may bel firmly held to said slide tokeep from tilting, whilehaving capacity to rotate properly on its vertical axis. To the turret 2is attached a ratchet-wheel 12, (shown-in Fig. 3,) secured to the lowerend of stem 2a, and 13 is a dog shown provided with a pin 13a, adaptedto engage the teethA of the ratchet, which dog is shown located in arecess 4b in guide 4 and provided with a spring 14 to press ittoward theratchet 12. (See Fig. la.) The position of the ratchet and. dog is suchthat when the slide 3 is moved toward the work the ratchet will slippast the pin 13, and the spring 14 will then push said pin into thelpath of a tooth of the ratchet, and when theslide 3 is movedback fromthe work said pin will engage the ratchet, so that a continued movementof the slide will cause said ratchet' to rotate the turret one step tobring another tool in line with the work. The ratchet 12 may move anydesired distance fromthe dog toward the work.

The means I have shown for locking the turret to hold a tool in theoperative position are as follows:` 15 is a sliding bar or bolt carriedin an extension 16, projecting from slide 3, 17 being a spring adaptedto project said bar or bolt toward the turret, and 18 is a screw toadjust the tension of said spring. The bar or bolt15 has a pin 19,depending through a slot or aperturel"L in extension 16. (See Fig. 3.)The inner end of the bar or bolt 15 is adapted to pass through apertures2b in' the sides of the turret forholding the latter in position, and Ihave shown said turret provided with an internal ring a, havingapertures a' alined wit-h the apertures 2b of the turret to receive theend of bar or bolt 15. The pin-19 is adapted .to withdraw bar or bolt 15from' the turret, and to accomplish this I provide a latch 20, that ispivoted to the side of guide 4 and provided with an upwardlyextendingweb 20, that extends at an angle to the plane of the side of guide4 toenable pin 19 to pass between the latter and said web. (See Fig. la.)The forward outer end of latch 2O is beveled at 2Ob for pin 19 to rideupon. A spring 21, carried by guide 4, serves to keep the latch in itsnormal position and for this purpose isishown` actingvupon the pin 22,depending from said latch. (See Fig. 3.) The arrangement is such thatVas the turret is fed toward thework the pin l9'will pass beyond and infront'of said latch, and on thereturn movement of the turret'said pinwill encount-er the beveled face 2Gb of the latch, and will ride up onthe same along the outer surface of the'latch,thereby withdrawing thebaror 'bolt 15 from engagement with the turret, and the pin 19 will remainin engagement with-the outer surfaceof said latch a suflicient time toenable ratchet 12 and dog 14 to rotate theturret one step, andthereuponV pin l19will slip from the end of web 20 to enable `thatthefturret will be'fed with a speed that accords with the cam-surfacewith which `the operating devices arealined, the cam during the feedingof the tool to 'the work rotating at a predetermined orconstant speed,audit is therefore not required that the cam be rotated at dierentspeeds in accordance with the character of different tools lor work. Inthis connection I'also provide means for moving rack- 9 to `return theturret from the Work, and these deviceslare arranged to return theturret ata speed increased over the speed of the feeding movement, so asto economize time. 23 is the cam referred to, and it is mounted torotateA freely upon ashaft 24, journaled in suitable bearin-gs'in frame1 and extending 1ongitudinally thereof, being shown beneath thetool-holder or turret 2. The cam 23 (shown more fully in Figs. 5, 6, 7,and 8) hasa surface 23a, which is substantially radial and rectangular,forming an edge 23h, extending substantially parallel with thelongitudinal axis of the cam. From the edge 23b the working surface23dof the camis formed on a gradual inward curve extending at one end 23emore than half-way around the longitudinal axis ofthe cam (see Fig. 5)and at the other end less than that distance, (seeFig. 6,-) and the edge23f of the working surface 23d opposite ICQ IOS

IIO

edge 23b extends ina curved or spiral .direction around the axis of thecam. (See Figs. 6 and 8.) By this means the distance from the edge 23bcircumferentially or peripherally of the cam along the working face 23dto 23f varies at all points longitudinally of the cam, or, in otherwords, the working surface 23d is of decreasing circumferential extentfrom one end to the other. The surface 23, furthermore, tapers from theend 23e to the other end, notwithstanding that the edge 231 issubstantially parallel with the axis of the cam. The edge 23f is wherethe work begins or, in other words, is where a lever, finger, or otherpart to be moved is presented to the working surface 23d of the cam, andit will be understood that as the cam rotates it will move said lever orfinger outwardly at a speed proportioned to the position of said leveror finger longitudinally along the face of the cam while the cam rotatesat a predeter- 'mined or constant speed. In order to conveniently bringthe part to be operated by the cam to the edge 23f Wherever desiredalong said edge, I provide the cam with a concentric surface 23g, whichterminates in a rectangular radial surface 23h, extending lengthwise ofthe cam opposite edge 23h, (see Fig. 5,) and the curved or spiral edge23 of the working face 23d of the cam coincides with the correspondingedge of the concentric surface 23g. (See Figs. 6 and 8.) The surface 23hwhen approaching the lever or finger enables the latter to rise up onsurface 23g, and the lever may remain in contact with said surface untilbrought inengagement with the working face of cam 23d at the edge 23f,whereupon the lever or finger will ride up on said surface. Thisconcentric surface 23g, therefore, is a guide to enable the lever orfinger to readily engage the main working surface 23d of the cam withoutinjury. As before stated, the cam 23 is to cause rack 9 to feed theturret to the work, and to accomplish this I have shown a lever 25, hungon a shaft 26, supported in suitable bearings on the frame 1 andextending longitudinally thereof, (see Figs. l and 3,) which lever isadapted to bear against the outer surface of a bail or rocking arm 27,supported by shaft `2b and adapted to operate upon rack 9 to push thesame transversely of guide 4E. The bail 27 is shown provided with afinger 2S, adapted to engage the outer end of rack 9 and having alongitudinal face of sufficient length to permit the rack to be adjustedlongitudinally of the machine while remaining in line with finger 2S.(See Fig. l.) This adjustment of the rack would occur when guide 4 isadjusted toward or from the work, as before stated. The outer surface ofbail 27 is of sufficient length to enable the upper end 25a of lever 25to be adjusted lengthwise of said bail while remaining in operativeposition relative thereto. (See Fig. l.) It

will be understood that when the caln rotat-es in the direction of thearrow in Fig. 3 the end 25b of lever 25 may pass into the space betweenthe faces 23 and 23h of said cam,

that said face 23h will first engage the end of the lever, and that thenthe lever will ride up on the concentric surface 23g and will remain incontact therewith until the edge 23f of the cam engages the lever,whereupon the lever will ride up on said surface and will be graduallytilted on its shaft 26 until the cam has passed under said lever at theedge 23". Lever 25 will then slip off said cam into the space betweensurfaces 231L and-23h. Thus as the lever 25 is tilted it. will act uponbail 27 and cause the saine to push rack -9 transversely, whereby pinion8 and rack 7 will cause the turret to advance to the work. During thetime that the lever 25 is not upon surface 23d the cam may be moved atan increased speed, and during such time the rack 9 is moved back towithdraw the turret from the work. This last-mentioned operation Iaccomplish as follows: At one end of cam 23 is a cam or finger 29,extending substantially to the outer surface of cam 23 and adjacent tothe edge 23b and adapted to engage a roeklever 30, that is hung upon ashaft 3l, supported in frame l and held from travel along said shaft,the upper end of lever 30 being adapted to engage one end of rack 9,whereby as cam or finger 29 engages lever 30 it may rock the same tocause the latter to push rack 9, whereby to withdraw the turret from thework. Lever 3() may have a pin or extension 30a to engage rack 9 whenthe latter is ad justed away from the work-holder 5. While the end 25bof lever 25 is not upon surface 23d of cam 23, cam or finger 29 mayoperate lever 30'to return the turret, and thus by the alternate actionof parts 23 25 and 29 30 upon rack 9 the turret will be reciprocated.

The speed with which the turret is advanced to the work will he inaccordance with the character of the tool and the work, and this speedis governed by the position of lever 25 relatively to the surface 23d ofcam 23. These various feeding speeds of the turret are ef fected whilethe cam is given a constant or definite speed of rotation. To regulatethe feeding speed of the tool to the work, I provide means for adjustinglever 25 longitudinally of cam 23 and for holding it in the adjustedposition, and for this purpose a shiftrod 32 is carried in suitablebearings on frame l and provided with a forked arm or its equivalent 33,that engages a groove in the hub 25 of lever 25, whereby said lever canrock, and yet when rod 32 is adjusted longitudinally said lever will becorrespondingly shifted in position. Rod 32 is jointed to a lever 34,being shown provided with a pin 32a, working in a slot 34 of said lever,(see Fig. 1,) and said lever is pivoted ou a support 35, carried byframe l. Level' 34 is acted upon by adjustable cams 36 on a cam wheel ordrum 37, carried by shaft 24, and said lever is provided with a pin orprojection 3S, adapted to lie in the path of and be engaged by cams 3G.It will be seen that cams 36,

IOO

ILO

vnally of the machine.

wliic'h'mayhave suitable shape, are located.'

atlopposite sides of' wheelv or drum 37 and` are shown provided withbolts or screws 36a to enter slots 37a in said wheel or drum, wherebysaid cams can b e adj usted longitudi- From this it will be understood.that by adjusting the cams 36 to the proper positions the lever 34 canbe caused to rock to a greater or less extent, thereby to shift rod 3-2and lever 25 more or less lengthwise of cam 23 in either direction, andthat after -said lever has been so shifted to the required positionrelatively to the cam it will remain in such position during the timethat the cam operates through said lever and rack 9 tofeed the turret tothe work. From what has been said it will be apparent thatv if lever 25bears uponcam-surface 23d neartheend 23e the feed of the turretwill bevrelatively slow, owing tothe long cam-surface that' trav-V els under thelever, and if lever 25 is adjusted nearv the opposite end of thecam-surface the feeding speed of the turret will be relatively fastbecause of the short cam-surface passing under the lever, and thefeeding of the'turret will be relatively fastor slow, according-to thecircumferential length of the cam-surface 23d, with which saidleverengages, the cam meanwhile rotatingat a constant speed.`

IV have provided meansfor rotating cam 23 at a predetermined speed-forfeeding the tool to the work, also at a faster speedduring the time thetool is returned from the work, and for rotating the shaft 24` alwaysata speed commensuratewith the speed of said cam, andthe means I haveshown for this purpose are as follows: Upon shaft 24 is loosely mounteda worm-wheel 40, with which is connected a gear 4l, the hub or shaft ofwhich gear or worm is adapted to be connected with cam 23 for-rotatingthe same. For convenience in adjusting the parts I have shown said camas provided with a hub 42, having notches 42a, adapted-to interlock withcorrespending projections carried by said gear or worm wheel, whereby acoupling or clutch is formed for rotating said cam by said worm andatthe same speed as the latter. The gear 41 isin mesh with a gear 43,mounted upon a shaft 44, carried by frame l, and 45 is a pinionconnected with gear 43 to be rotated thereby, said pinion being in meshwith a gear 46, secured to shaft 24, as by a key, (see Fig. 4,) wherebythrough said gearing said shaft is rotated. Thespeed of rotation ofshaft 24 relatively to the speed of rotation of cam 23 may be regulatedas desired by substituting other gears having a dierent ratio ofdiameters. The worm-wheel 40 is in mesh with a worm 47, that vis adaptedto y be rotated at dierent speeds, lone of which speeds is for rotatingthe cam 23 to feed the tool to the work, and the other speed is forreturning the tool from the work, and the speed of shaft 24 will becorrespondingly changed as the speedof rotation ofworm 40 is changed.

Vhold the clutch membersV disengaged.

The means lhave shownforfrotatingworm 47 at a high and a'low speedarefsubstantially like theV devices shown inl the patent issued to me onOctober 24, 1899, No. 635,518, to

gear 54 being free to'rotate, all as inmysaid- 55 is a toothed wheel orratchetv mounted to rotate freely around shaft 48 and patent.

rigidlyconnected withI gear 54, and: 56 isra dog pivot-ally connectedwithframe l and adapted to permit ratchet v55 andA gear 54 to rotatein'one direction, but to hold them from rotation'in the reversedirection. When pulley 49 rotates in the directionof the arrow in Fig.'l, the pinions. 50'51 52, acting uponthe "dierential gears 53 54, willcauseworm 47 to rotateanddrive cam '23 and shaft ,24 at a relative-lylow speed, gear-.54 beingheld by ratchet'55 and dog 56 from reverserotation. To drive worm 47` at the same speed as pulley;49, a clutch isprovided to connect said worm directy withfshaft 48. 57'isa handwheelsecured to the` hub or sleeve of worm 47and inclosing a disk, as. in mysaidfpatent, forming part of the clutch, the disk/beingsecured to .shaft48, 59 being the sliding member of theclutch-engaging hand-wheel57, sothat when the clutch-membersare in engagement` worm 47 will be locked toshaft 48, as more fully set forth in my said patent.l The clutch. member59 is connected:1 with a sliding rod 60, having a spring v6l to holdtheclutch members in engagement, and said rod has a latch- 62 to engagea stop 63v (seev Fig. 4) to The latch 62 isito be released from-saidstopat the proper time to cause-the clutch-members to engage, for whichpurpose a rockinglever oringer 64 is provided andsuitably pivoted uponframe l and adapted to engagethe beveled edge 62a of latch 62 (see Fig.4) to release said latch from stop 63, said -lever also being adapted toengage an abutment 60L on rod 60 to move'said rod to the right in Fig. 4to uncouple the clutch. Finger or lever 64 is rocked by meansofadjustable cams 65, carried by a disk 66, secured to shaft24. Thearrangement is such that when the working surface 23d of cam 23fisacting upon lever -25= the clutch will be held uncoupled by latch 62,the cam 65 and the lever 64 having so adjusted the parts whereby cam 23and shaft 24 through the connected gearing will be rotated by pulley 49,&c., ata relatively slow speed to cause the turret to feed to the work.`When the edge 23b of cam 23 passesfrom 1elOO IIO

ver 25, a cam will cause lever 64 to release latch (52 from its stop 63,and thereupon the clutch will couple, whereby pulley 49 will rotate worm47, cam 23, and shaft 24 at the high speed until edge 23f is againpresented to lever 25, and during this time finger or cam 29 causeslever 30 to operate rack 9 to withdraw the turret from the work, wherebythe latter rotates to present a new tool in working position. Duringthis same time if the feeding speed of a tool is to be changed from thefeeding speed of the preceding tool lever 34 will be moved to adjustlever 25 longitudinally of cam 23 in to the proper position for sofeeding said tool.

I have also provided improved means for feeding crosscut-tools atdifferent speeds, accordng to the requirements of the tool and the work.To this end I have provided the following arrangement: is a cross-feedslide suitably guided on frame l, as by a way 7l, which slide isprovided with means, such as slots 70, for adjusting a tool-holder 72longitudinally of frame l, which toolholder is adapted to hold a tool inposition to operate crosswise upon stock or material held by the chuckor holder 5 in well-known manner. The slide 70 is reciprocatedtransversely of frame l through the medium of levers 73 and 74 and camsof peculiar construction carried by shaft 24. Lever 73 is mounted upon ashaft 75, jonrnaled in bearings on frame l and held from longitudinalmovement by suitable means, as a pin or screw 76, a screw 73a or thelike serving to lock lever 73 to shaft 75 in any position to which saidlever maybe adjusted along said shaft. Lever 74 is mounted upon a shaft77, journaled inv bearings in frame l and held similarly to shaft 75, ascrew 74a or the like serving to lock lever 74 to shaft 77 in anyposition desired. Lever 73 is acted upon by a cam 78 to move slide 70crosswise, which cam is shown secured to a disk 79, attached to shaft24. (See Figs. 9 and 9a.) The working surface 782t of cam 78 is ingeneral characteristics similar to the working surface 23d of cam 23,the face 78a having an edge 78b coincident with a substantially radialface 78C, and from the edge 78b the face 78 gradually approaches shaft24 andthe face 78a of the cam tapers transversely. One end of Workingface 7 8a is bev eled or inclined on a line or edge 78, and between thatline and the edge 78B, coincident with the face 78f, the cam has aconcentric surface 78g. The speed of cross-feed of slide 70 by cam 78and lever 73 will be proportioned to the position of said lever againstthe working face 78a of said cam, and the concentric face 78g causes theend of said lever to ride up on the cam, so that the lever will be inproper position to engage any portion of the face 78a at the edge 78d.

or projection shown connected with disk 79 and projecting in a directionopposite to cam 78 and adapted to engage lever 73 for the purpose ofcausing said lever to move slide 70 to 8O is a carn a central positionafter said slide has been l'novefl by a lever 74. When edge 78" of cam78 passes from lever 73, said lever is free to be moved by cross-slide70 until Vengaged by cam 80. Lever 74 is adapted to be moved by cam 8]to move slide 70 in a direction opposite to its movement by lever 73,either to return tool 72a from the work or to cause another tool tooperate on the work. Cam 8l is shown connected to disk 79, but on theside of said disk opposite cam 78, and cam 8l is also disposed in aradial direction opposite to cam 78. (See Fig. 9.) Gam 8l hasa step orworking face 8l, adapted to first encounter lever 74 to cause the latterto move slide 70 to a central position, and said cam also has a workingface 81h, similar in general characteristics to the working face 78a ofcam 78 and provided with a curved edge 81, coincident with a concentricface 81d. The face 81l [irst encounters the end of lever 74 to causesaid lever to ride up on face 8lh inV manner described with reference tocam 78. As cams 78 and 8l are connected with shaft 24 they will berotated coincidently with the operation of the parts that reciprocatethe turret, and while the cams 78 and 8l maybe set in any positiondesired it will be understood that said cams will bring the cross-cuttools in a proper position ready for operation and `retain said tools insuch position while the turret-tool is operating, and that when theturret-tool has performed its work the cams 78, 80, and 8l will operatethe cross-slide 70 to cause the tool or tools connected therewith toperform any desired operation.

Any suitable means may be provided for holding the work in the holder orchuck 5 and for feeding the work the desired extent. Furthermore, as itis sometimes desirable to reverse the rotation of holder or chuck 5 Ihave provided improved means for this purpose, as follows: 85 is ahollow shaft or sleeve, to which chuck or tool-holder 5 is attached,which shaft may be supported to rotate in suitable manner, and 86 87 areloose pulleys mounted to rotate freely around said shaft. Each pulley isprovided with a disk or plate 88 89, respectively, connected with shaft85, and 90 is a sliding sleeve or spool mounted to rotate around shaft85 and provided with arms 90L 90b, projecting from opposite ends andpassing through slots in disks or plates 88 and 89. (See Figs. l0, ll,and 12.) Sleeve 90 is provided with an annular groove 90 to receive ashifting fork 9l. 92 93 are bushings keyed on the shaft 85 and securedto or formed on disks or plates 88 89,1espectively, being provided forconvenience in adjusting the part-s together, and upon these bushingssleeve 90 is mounted to rotate. Friction devices are provided within thepulleys 86 87 for connecting shaft 85 rotatively with said pulleys, andas these devices are substantially alike for both pulleys a descriptionof one will suffice. To this end one or more exible arms 94 are securedto the plates 88 89 and adapted to engage the inner IOO IIO

' stock that projects from the jaw 106.

surface of said pulleys, and the ends of said arms have enlargementsprovided with coneshaped recesses 94, adapted to receive conical plugs95 for-expanding said rings, in Fig. 12 the plugs 95 being shown locatedbetween the Opposed coned recesses 94a at the ends of two arms 94. Thestems 95a of the plugs 95 are connected with blocks 96, whose pivotsengage rock-levers 97, journaled on lugs 98, or the like, carried by theplates 88 89, the opposite arms of said levers projecting through slotsin said plates and having outwardlybent ends 97a, adapted to engage thebeveled .(See Fig. 10.) As said ends of arms 90a 90b. arms ride underthe levers 97 the latter will be rocked on their pivots to draw theconeplugs 95 outwardly between the ends of 'arms 94 to expand the latterinto engagement with the pulleys. At the right in Fig. 10 the parts 95and 97 are shown in the operative position, whereby pulley 86 is infrictional connection with shaft 85, while the friction devicesconnected with pulley 87 are not operated, so that pulley 87 is free torotate. By sliding sleeve 90 to the right or left either-.pulley 86 or87 can be caused to rotate shaft 85, and as said pulleys are to berotated by belts in opposite directions shaft 85 can be correspondinglyrotated. When sleeve 90 is in a central position, both sets of frictiondevices will.A be free, so that shaft 85 and the tool-l holder 5 cancome to rest. I have provided means for automatically shifting sleeve90, which means comprise a rocking arm 99, pivotally connected withframe 1 and adapted to shift fork 91 along its supporting-shaft 100,which is suitably mounted in bearings on frame l, and the arm 99 isshown provided with aforked end 99a, having set-screws 99b to engagefork 91, (see Fig. 2,) whereby proper adjustment for the desired amountof movement can be effected. By preference arm 99 is rocked by means ofone or more cams 101, adjustably secured upon a disk 102, carriedbysh'aft 24, (see Figs. 2'and.9,) arm 99 havinga pin 103, Fig. 9, to beengaged by` said' cams, whereby as shaft 24 rotates the arm 99 can berocked to move slide 90 in either direction alongshaft 85 or to bringthe slide to a central position. The cam or cams 101 can be adjustedaround disk 102 in accordance The devices I have shown for feeding stockthrough the holder and chuck 5 and clamping it thereto are as follows:105 is atube within the bore of shaft 85 and having at one end aremovable clamping-jaw 106 to grasp the stock and at the other end agrooved head 107. (See Fig. 10.) 108 is a tube within the shaft85 andsurrounding tube 105 and havingA at one end a clampingjaw 109, providedwith external beveled faces to coact with the internal beveled faces ofchuck 5 to grip the At the opposite end of shaft 85 is a head 110,having abutments 110, against which shoulders 111a of levers 111`areadapted to bear, which levers 4shaft 85.

'to tube 108.

Aspool 115. :116 and having a fork 120 to engage the groove fin head107. at the proper time by means of a cam-wheel, ,and for this purposethe sleeves are shown provided with wear-pieces 117'v1 119,respecltively,adapted tobe engaged, respectively, by `fcams 121 122 123011 a cam-wheel 124, car- ;ried by shaft 24, means, such as slots andbolts, being provided to shift said cams upon 'along-rod 116 more orless. rtions of sleeves 119 and 117 will atthe proper time allow jaw 106to take a new grip on the fwork, cause jaw 109 to release the work,permit jaw 106 to projeotthe Work forwardly ifi-.om the chuck 5 a properdistance, and cause jlevers 111 to act with tube 108 to grip the Astockin the chuck, and said operations will -occur in accordance with thepositions of the ,cams upon wheel 124, as maybe necessary.

are pivoted to a ring 112, mounted to slide on From ring 112 a pin 113projects through a slot-114 in shaft 85 and is secured When levers 111are pressed outwardly, their shoulders 1.11a engage head 110, andthereby ring 112 is moved forwardly 'and pin 113 pushes tube 108 so thatits jaw 109 in chuck 5 grips the stock projecting from jaw 106. Levers111 are pressed outwardly by a spool 115, having the beveled face 115,which spool is mounted to slide upon shaft 85, and'is shown providedwith an annular groove 1151. 116 is a rod projecting from a 5suitablepartof frame 1, and upon saidrod a vsleeve 117 is mounted to slide, saidsleeve having a fork 118 to engage the groove of 119 is a sleeve mountedupon rod These sleeves are reciprocated the wheel, so as to move sleevesI117 and 119 The reciproca- While I have shown the cam 23 as madequirements of the working surface 23d, and it is also evident thatinstead of'shifting the lever or finger 25 along the cam the latter`could be shifted relatively to the lever, producing the same resultdescribed, and it is also apparent that the various details ofconfstruction. shown and described may be varied :without departing fromthe spirit of my ingvention.

with the time at which arm 99 shall be rocked..

Having now described my invention, what vI claim is- 1. The combinationof atool-holder or turret, with a cam, and means between the turret andcam to feed 'the turretby the cam at speeds that accord with theposition of said means relatively to the cam, substantially asdescribed.

erating-surfaceof the cam, substantially asl described.

3. The combination of a tool-holder or tur- IOO IIO

ret, with a cam having a working surface of yvarying circumferentialextent from one end toward the other, and devices between said cam andturret for feeding the turret at speeds which accord with the operatingcircumferential length of the surface of the cam, substantially asdescribed.

4L. The combination of a tool-holder or tur ret, with a rotative cam,devices between the turret and the cam for feeding the former at varyingspeeds by the latter, and means for adjusting the position of thecoacting device along the cam relatively to the working face of thelatter, substantially as described.

5. The combination of a tool-holder or turret, with a cam having aworking surface extending in the direction of the axis and provided witha spirally-disposed edge extending in the direction of the axis, anddevices between the turret and the cam for feeding the former by thelatter, substantially as described.

6. The combination of a toolholder or turret, with a cam having acircumferential working surface provided with an edge substantiallyparallel with the axis of the cam and an opposed spirally-disposed edgeforming a surface of varying circumferential extent between said edges,and devices between the turret and the cam for feeding the former by thelatter, substantially as described.

7. The combination of a tool-holder or turret, with a cam provided withan eccentric working surface having a spiral edge and a concentricsurface adjacent thereto having a corresponding spiral edge, and devicesbetween said turret and cam for feeding the former by the latter,whereby said concentric surface will bring the cooperating device intoposition to act upon the eccentric surface, substantially as described.

8. The combination ofa tool-holder or turret, with a cam having aneccentric working surface provided with an edge extending longitudinallyand a concentric surface adjacent thereto and provided with an edgeextending longitudinally of the cam forming a space between said edges,and devices between the turret and the cam, whereby said longitudinalface will cause the cooperating device to rise upon the concentricsurface to guide it to the eccentric surface, substantially asdescribed.

9. The combination of a tool-holderor turret, with a cam having aneccentric working surface provided with an edge extending longitudinallyof the axis of the cam and a spiral1y-disposed edge opposed thereto, aconcentric surface adjacent to said spiral edge and having an edgedisposed longitudinally of the axis of the cam, and devices between theturret and the cam for feeding the former by the latter, substantiallyas described.

10. rlhe combination of a tool-holder or turret, with a cam having aworking surface provided with an edge substantially parallel with theaxis and an opposed edge extending spirally of the axis, a lever adaptedto be operated by said cam, devices between said lever and the turret tofeed the latter, and means for adjusting the position of said lever andcam relatively to each other, substantially as described.

11. The combination of a tool-holder or turret, a lever adapted tooperate the same, a cam to operate said lever, said cam having a workingsurface of varying circumferential extent tapering from one end to theother, and adjustable devices adapted to shift said lever to differentpositions relatively to the cani, substantially as described.

12. The combination of a toolholderor turret, with a lever to operatethe same, a cam to operate the lever, shifting devices to move the leverinto different positions relatively to the cam, and acam-wheel tooperate the shifting devices, substantially as described.

13. The combination of a tool-holder or turret and its actuatingdevices, with a cam, a 1ever adapted to be shifted along the cam, and abail or rocker interposed between the level' and the turretactuatingdevices and having a surface along which said levercan be shifted,substantially as described.

14:. The combination of a tool-holder or turret, with a cam providedwith an eccentric surface havinga varying circumferential ex` tent, anda concentric surface adjacent thereto, a lever to be operated by saidcam to feed the turret to the work, a finger or cam coperative with thelirst-mentioned cam, a lever to be operated thereby, and devicesintermediate said levers and the turret for reciproeating the same bythe action of said cams, substantially as described.

15. The combination of a tool-holder or turret, a shaft, a cam mountedto rotate'relatively to said shaft, a wheel or drum carried by saidshaft and provided with adjustable cams, means for rotating said cam andshaft at relative speeds, a lever to operate said turret and adapted tobe actuated by said cam, and shifting devices connected with said leverand adapted to be operated by the cams of said wheel or drum to shiftthe lever into different positions relatively to said cam, substantiallyas described.

16. The combination of a tool-holder or tur ret, with a cam, a shaftaround which said cam is adapted to rotate, means for rotating said camat a relatively high and low speed, gearing connecting said cam andshaft for rotating them at relative speeds, and a lever adapted to beoperated by said cam to feed said turret, substantially as described.

17. The combination of a turret, with a cam, a shaft upon which the sameis adapted to rotate, a worm and worm-wheel to rotate said cam, meansfor rotating said worm at dierent speeds, gearing connecting saidwormwheel with said shaft, a lever to operate said turret by said cam,and devices connected IOO IIS

With said shaftand Withfsaid lever for shifting said lever alongthe faceof the cam, substantially as described.

18. The combination of a turret and a guide therefor, with a rackconnected With the turret," a rack and pinion to operate thefirstmentioned rack, and means for reciprocating the second-mentionedrack to cause the pinion and first-mentioned rack to reciprocate'mentioned rack, abail orv rocker to act on" the second-mentioned rack, acam, anda lever intermediate said bail and cam to operate ther former bythe latter, substantially as described.

21. The combination of a turret, and a guide therefor, with a rackconnected with 4the turret, a rack and pinion tooperate thefirstmentioned rack, a pair of levers to reciprocate thesecond-mentioned rack to reciprocate the turret, and a pair of cams tooperate said levers, substantially as described.

22. The combination of a turret and a guide therefor, With a rackconnected with the turret, a rack and pinion to operate thefirstmentioned rack, `a pair of levers to reciprocate thesecond-mentioned rack, a cam, and means for shifting one of said leversalong the face of said cam to vary the feeding speed of the turret,substantially as described.

23. The combination of a turret, a slide therefor, a guide for theslide, a support for the guide, and means for adjusting the guide towardand from the Work, with means to reciprocatethe slide, a bail or rockerto act on said means, a lever to operate the bail or f=rocker, and a camto actuate the lever, Wheresby When theguide is adjusted the bail-orrocker will remain inoperative relation to `the turret-reciprocatingmeans, substantially as described.

24. The combination ofV a cross-slide, and

fmeans for supporting a tool thereon, With a pair of-levers to operatethe same, a `pair of lcams to operate said levers, andmeans foradjusting said levers along the faces of the ycams for varyingthe-.speed of movement of said cross-slide, substantially as described.25. The combination of a cross-slide, and means for supporting a toolthereon, `With a pair of levers to operate the same, a pair of cams tooperate said levers, means for adjustling said levers along the faces ofthe cams for varying the speed of movementk ofsaid Icross-slide, andmeans for operating said le- Ivers to move the vcross-slideto a vcentralposition,.substantiallyas described.

26. The combination of a cross-slide, an means for supporting a toolthereon, with a pair of levers to operate said slide, and a pair :ofcams to operate said levers, said cams hav- :ing Working faces ofvarying circumferential .lengths for varying the feeding speedof the:cross-slide according to the position of the levers .relatively to saidWorking faces, and means forholding said levers in the requirediposition relatively to the cams,substantially as described.

27. The combination of av cross-slide and means for supporting a toolthereon, Withl a pair of levers tooperate said slide, a rotaitivesupport located between said levers, and zcams securedupon oppositesides of said suprport to operate said levers respectively, said .camseach having a Working face. of varying circumferential length in thedirection ofrotation, substantially as described.

GUSTAV SITTMANN.

Witnesses:

WALTERH. PITT, HENRY M. WELLS.

